The games are split into generations. The defining point of where new generations begin is when a new standard style Pokémon game with a set of new Pokémon added to the Pokédex is released. Games are also split between main series games and spin-off games. In most main games, the player can choose one out of three Pokémon to start their journey with. Spin-off games give players various options in the way they both obtain and make use of Pokémon.